Abstract: An antenna module is provided. An antenna module according to an exemplary embodiment of the present invention comprises: a circuit board; a radiation pattern formed on at least one surface of the circuit board and formed in a loop shape to have an empty space part formed at a central part thereof; a first shielding sheet stacked on the upper surface of the circuit board to include an area corresponding to the empty space part; and a second shielding sheet stacked on the lower surface of the circuit board to include an area corresponding to the empty area part, wherein the first shielding sheet and the second shielding sheet are disposed such that the areas corresponding to the empty space part on the opposite surfaces of the circuit board overlap each other.

Abstract: Provided is a compound of Chemical Formula 1: wherein: each X is independently N or CH, provided that at least one X is N; Ar1 and Ar2 are each independently a substituted or unsubstituted C6-60 aryl or a substituted or unsubstituted C5-60 heteroaryl containing one or more of N, O and S; Ar3 is a substituted or unsubstituted C5-60 heteroaryl containing at least one N; D is a substituent of any one of the following Chemical Formulas 2-1 to 2-3: wherein: Y1 is O, S, NR2, or CR3R4; n is an integer of 0 to 10; each R1 is independently hydrogen, deuterium, or a substituted or unsubstituted: C1-60 alkyl, C3-60 cycloalkyl, C6-60 aryl, or C5-60 heteroaryl containing one or more of N, O and S; and R2 to R4 are each independently a substituted or unsubstituted C1-60 alkyl or a substituted or unsubstituted C6-60 aryl, and an organic light emitting device comprising the same.

Abstract: Provided is a method of applying a nano coating to stainless steel including cleaning stainless steel; polishing the stainless steel with a nano abrasive composed of colloidal silica, nano-sized diamond particles, and ethylene glycol; immersing the stainless steel in a pickling solution composed of hydrochloric acid and containing an ionic liquid for 25 seconds; heat treating the surface of the stainless steel; applying a nano-coating agent composed of isopropyl alcohol, methylsilsesquioxane, siloxane, sulfuric acid, and distilled water to the surface of the stainless steel heat treated through the heat treatment step in an amount of 60 mg/m2; curing the nano-coating agent applied on the surface of the stainless steel for 5 minutes; coating the surface of the stainless steel with a chromium mixture; and coating the surface of the stainless steel coated with the chromium mixture through the chromium mixture coating step with a finishing agent.

Abstract: Provided is a heterocyclic compound of Chemical Formula 1: wherein: X is O or S; Y1, Y2 and Y3 are each independently CH or N, provided that at least one is N; L1 and L2 are each independently a direct bond, a substituted or unsubstituted C6-60 arylene, or a substituted or unsubstituted C5-60 heteroarylene containing at least one of N, O and S; and Ar is a substituted or unsubstituted C6-60 aryl, and Ar2 and Ar3 are each independently a substituted or unsubstituted C6-60 aryl or a C5-60 heteroaryl containing at least one of N, O and S, provided that when all of Ar1, Ar2 and Ar3 are a substituted or unsubstituted C6-60 aryl, any one of Ar1, Ar2 and Ar3 is substituted with 4 or more deuteriums; and an organic light emitting device including the same.

Abstract: Provided is a carbon monoxide (CO) leak alerting device and method, and more specifically, a CO leak alerting device and method, whereby, by operating on the basis of the Internet of Things (IoT), a CO leak caused by damage to a boiler flue is detected, an alert is issued through two or more among the CO leak alerting device, a boiler controller and a wall pad, boiler ventilation and indoor air ventilation are automatically carried out when the leak is determined to have occurred, and authorities relevant to the CO leak, and a user are directly notified of the CO leak.

Abstract: An antenna module is provided. An antenna module according to an exemplary embodiment of the present invention comprises: an antenna unit including an antenna pattern, which has a pattern portion and a lead portion formed, respectively, on both surfaces of a circuit board; a magnetic field shielding sheet including a sheet body made of a magnetic material to block a magnetic field, and a plurality of eddy current reducing pattern portions formed on the sheet body to reduce the generation of eddy current by increasing the resistance of the sheet body; and an insulation member arranged between the antenna unit and the magnetic field shielding sheet, wherein the antenna unit is provided in an asymmetric form in which the pattern portion and the lead portion respectively formed on both surfaces of the circuit board have different thicknesses.

Abstract: The present disclosure provides a variant polypeptide having an activity of aspartate 1-dicarboxylase; a microorganism including same; a composition for producing beta-alanine or beta-alanine-derived compounds, the composition comprising the microorganism; and a method for producing beta-alanine or beta-alanine-derived compounds, the method comprising a step for culturing the microorganism.

Abstract: Disclosed is an magnetic field shielding sheet for an antenna module is applied to an antenna module comprising an antenna unit operating in a predetermined frequency band and a magnet for position alignment, and comprises: a main shielding sheet made of a magnetic material so as to be able to shield a magnetic field generated from the antenna unit; and at least one magnetic saturation-prevention member stacked on one side of the main shielding sheet so as to be able to prevent magnetic saturation of the main shielding sheet by inducing a direct magnetic field generated from the magnet, wherein the magnetic saturation-prevention member is provided in a number corresponding to the number of magnets provided in the antenna module and is positioned on one side of the main shielding sheet so as to be positioned at a position corresponding to the magnets provided in the antenna module.

Abstract: A magnetic field shielding module for an electric vehicle is provided. A magnetic field shielding module for an electric vehicle according to an embodiment of the present invention may comprise: a main shielding layer including a plurality of unit blocks made of a ferrite material to shield a magnetic field generated from a planar coil in which a conductive member is wound multiple times, the main shielding layer being formed in a plate shape having a predetermined area by the plurality of unit blocks arranged adjacent to each other; and an auxiliary shielding layer made of a magnetic material containing a metal component to supplement the main shielding layer, disposed on one surface of the main shielding layer, and including a penetrating portion formed in a shape corresponding to that of the planar coil.

Abstract: The present invention relates to an auxiliary power supply device for generating auxiliary power of a power conversion device, the auxiliary power supply device comprising: a first auxiliary power supply unit which receives power applied from a photovoltaic module and generates auxiliary power therefrom; a second auxiliary power supply unit which receives power applied from a grid and generates auxiliary power therefrom; and a driving unit which can selectively drive the second auxiliary power supply unit according to the magnitude of voltage of the photovoltaic module. Accordingly, the present invention has an advantage in that an auxiliary power supply can be normally operated even in an environment where photovoltaic power generation is not performed.

Abstract: A wafer cleaning method is provided. The wafer cleaning method includes providing a wafer on a stage that is inside of a chamber. The wafer is fixed to the stage by moving a grip pin connected to an edge of the stage. First ultrapure water is supplied onto the wafer while the wafer is rotating at a first rotation speed. The grip pin is released from the wafer by moving the grip pin. A development process is performed by supplying liquid chemical onto the wafer while the wafer is rotating at a second rotation speed that is less than the first rotation speed.

Abstract: Disclosed is a method for producing 1,4-dibromo-2,3-dichlorohexafluorobutane (Br—CF2—CFCl—CFCl—CF2—Br), in which, through the photoreaction of 1,2-dibromo-1-chlorotrifluoroethane (Br—CF2-CFCl—Br) with a CTFE (CF2?CFCl) gas mixed with a diluent gas, 1,4-dibromo-2,3-dichlorohexafluorobutane is produced. According to an embodiment of the present disclosure, an intermediate for producing hexafluoro-1,3-butadiene (C4F6) can be produced with high production yield.

Abstract: A magnetic field shielding sheet including: a plurality of magnetic layers having at least one eddy current reduction pattern part formed thereon; and a heat-dissipating magnetic field shielding unit including heat-dissipating adhesive members arranged between adjacent magnetic layers to improve the heat transfer in the thickness direction of the magnetic field shielding unit. By the magnetic field shielding sheet, the occurrence of eddy currents can be reduced, a high magnetic permeability of 2000 or more can be implemented while having a very thin thickness, and eddy currents that increase by selectively forming an eddy current reduction pattern locally in a region corresponding to the antenna among the entire area and the heat generated by the increase in eddy currents due to the thinner thickness according to the recent trend of being light, thin, short and miniaturized and the resulting decrease in resistance can be quickly discharged to the outside.

Abstract: A compound represented by Chemical Formula 1 and an organic light emitting device comprising the same, the compound used as a material of an organic material layer of the organic light emitting device and providing improved efficiency, low driving voltage and improved lifetime characteristics.

Abstract: A table device for a vehicle includes: a table mounted on a fixing unit and provided to slide forward; a first stopper mounted on the fixing unit and configured to move up and down and to restrict a movement of the table; and a second stopper rotatably mounted on the fixing unit. The second stopper can latch to and be positioned on the first stopper to restrict upward and downward movements of the first stopper. The second stopper is configured to selectively rotate by a forward acceleration or force generated in an event of a vehicle collision to be released from the latching of the first stopper.

Abstract: A heterocyclic compound represented by Chemical Formula 1 and an organic light emitting device comprising the same, and the heterocyclic compound used as a material of an organic material layer of the organic light emitting device and providing improved properties of efficiency, driving voltage and lifetime characteristics of the organic light emitting device.

Abstract: The present disclosure relates to a system and a method for discharging carbon monoxide (CO) by using a CO leakage alarm device and, more specifically, to a system and a method for discharging CO by using a CO leakage alarm device, the system and the method being operated on the basis of the Internet of things (IoT) so as to: detect CO leakage caused by damage to a boiler flue and sound an alarm through at least two from among the CO leakage alarm device, a boiler controller, a wall pad, and the like, automatically perform boiler ventilation and indoor air ventilation when the leakage is determined; and directly notify CO leakage-related authorities and users about the CO leakage.

Abstract: A magnetic shielding sheet for a wireless power reception module is provided. A magnetic shielding sheet for a wireless power reception module according to an exemplary embodiment of the present invention, which is applied to a wireless power reception module capable of a wireless power share (WPS) function and has an overall thickness of 150 ?m or less. The magnetic shielding sheet includes a first sheet made of a magnetic material to shield a magnetic field, and a second sheet laminated as a monolayer on one surface of the first sheet by means of a bonding adhesive layer, wherein the second sheet is provided to have a smaller thickness than a thickness of the first sheet while having a saturation magnetic flux density twice or more than a saturation magnetic flux density of the first sheet.

Abstract: A magnetic shielding sheet and a manufacturing method therefor are provided. The magnetic shielding sheet according to an embodiment of the present invention, which is placed on one surface of an antenna comprising a hollow part disposed at the center thereof and having a predetermined area and a pattern part surrounding the hollow part, may comprise: a sheet body which is made of a magnetic material so as to be able to shield a magnetic field; and at least one eddy current-reducing pattern part which is formed in the sheet body so as to increase the resistance of the sheet body so that the occurrence of eddy current can be reduced.

Abstract: Provided is a compound of Chemical Formula 1: wherein: X1 to X6 are each independently CH or N, provided that at least one of X1 to X6 is N; Ar1 to Ar4 are each independently a substituted or unsubstituted: C6-60 aryl or C2-60 heteroaryl containing one or more of N, O, and S, provided that at least one of Ar1 to Ar4 is any one of: R2 is hydrogen, deuterium, or a substituted or unsubstituted: C6-60 aryl or C2-60 heteroaryl containing one or more of N, O and S; each R3 is independently hydrogen, deuterium, or a substituted or unsubstituted: C6-60 aryl or C2-60 heteroaryl containing one or more of N, O, and S; each R1 is independently hydrogen, deuterium, or a substituted or unsubstituted: C6-60 aryl or C2-60 heteroaryl containing one or more of N, O and S; and n is an integer of 0 to 8, and organic light emitting devices including the same.